All-metal gasket



Nov. 8, 1938. p J/FITZGERALD 2,135,807

ALL-METAL GASKET Filed March 25, 1937 Patented Nov. 8, 1938 UNETE STT ALL-METAL GASKET Patrick J. Fitzgerald, Torrington, Conn., assignor to The Fitzgerald Manufacturing Company,

Torrington, Conn, a cut Application March 23,

1 Claim.

This invention has to do with gaskets which are commonly known as cylinder head gaskets, and is concerned primarily with a laminated gasket of an all-metal construction.

There has recently been proposed in this art the use of a laminated all-metal gasket, that is one made up from a plurality of layers of sheet metal, which several layers are held in assembled relationship as by the use of adhesives or spot welding.

The present invention has in view, as its foremost objective, the provision of an all-metal laminated cylinder head gasket of the character described, in which the several laminations are maintained assembled by a so-called staking of the laminations. In staking the laminations in accordance with this invention, an appropriate tool is availed of as a means of deforming the metal of the several layers over a desired zone, and when the deformed portions of the metal are substantially returned to their original positions the several laminations are maintained in assembled form.

More in detail this invention has in view as an object the formation of wedge shaped stakings which are cut from the several laminations by the use of a chisel, or other appropriate tool, and which stakings are hammered back into substantially their original position to provide substantially flush surfaces, and at the same time prevent relative movement between the several sheets of metal.

The invention has in view as a further more detailed object the provision of a cylinder head gasket of the character described, in which the outer layers are maintained unperforated, but in which the intermediate layers are provided with a plurality of small perforations closely spaced apart, together with an appropriate cementitious material which is present on all the surfaces of the intermediate layers, and which is contained in the perforations. This cementitious material, together with the staking of the metallic layers in the manner above noted, serves to maintain the several laminations in proper assembled relationship.

Other more detailed objects and advantages of the invention will in part become apparent, and in part be hereinafter stated, as the description of the invention proceeds.

The invention, therefore, comprises a cylinder head gasket of an all-metal laminated construction, the intermediate layers of which are perforated, and which are coated with a cementitious 55 material. The laminations are staked by cutcorporation of Connecti- 1937, Serial No. 132,466

ting out or deforming portions of the metal thereof, and then substantially, but not quite, returning the deformed portions to their original position; the stakings being of a wedge shape.

For a full and more complete understanding of the invention, reference may be had to the following description and accompanying drawing, wherein Figure l is a plan View of a portion of the cylinder head gasket made in accordance with the precepts of this invention,

Figure 2 is an enlarged detailed view in perspective of one portion of the gasket, bringing out the formation of the stakings,

Figure 3 is a detailed showing in transverse section of the stakings after they have formed prior to being pressed back into place, and

Figure 4 is a sectional view similar to Figure 3, taken about on the plane represented by the line il of Figure 1, showing the stakings pressed back into place.

Referring now to the drawing, wherein like ref erence characters denote corresponding parts, a cylinder head gasket is shown in Figure 1 as including a main body portion B, which is of an allmetal laminated construction, as will be hereinafter pointed out in detail. This main body B is formed with cylinder openings l0, and circulatory water openings H. The main body portion B of the gasket shown in Figure 1 is of a laminated construction comprising outer layers l2 and I3, and intermediate layers l4.

As clearly set forth in the co-pendirig application of Patrick J. Fitzgerald, Serial Number 114,375, for Gasket, filed December 5, 1936, the intermediate laminations It may be perforated and provided with cementitious material, which serves to assist in providing a unitary body structure.

, In accordance with the present invention the several layers l2, l3 and M are maintained assembled by staking the same. In effecting this arrangement an appropriate tool, such as a chisel having the required shape, is applied to the metal of the laminations to deform the same into the condition depicted in Figure 3, in which wedgeshaped stakings 15 are cut from the laminations and deformed outwardly. When these stakings i5 are depressed back into substantially, but not quite their original position, as shown in Figure 4, the several laminations are relatively immovable, and hence will be'maintained in their required assembled relationship.

It will be noted from Figure 4 that each staking I5 is slightly out of line from the planes of the surfaces of the lamination from which it was originally struck. It is this arrangement which afl'ords the desired binding effects.

While the present invention is herein illustrated in conjunction with intermediate layers M, which are of the perforated construction shown in the co-pending Patrick J. Fitzgerald application above referred to, it is important to note that the present stakings may be carried out in all-metal gaskets in which the intermediate layers are not perforated. Also, various other changes and departures may be made without departing from the spirit of the invention as defined by the appending claim.

I claim:

A cylinder head gasket of the character described comprising a plurality of sheet metal laminations which together define an all-metal gasket, and means for maintaining said laminations in an assembled relationship permitting a slight amount of relative movement between the several laminations, said means consisting of stakings of wedge-shaped formation, there being a pair of such stakings with the smaller edges of the wedge-shaped formations disposed towards each other.

PATRICK J. FITZGERALD. 

